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(No Model.) I

W. P. KOOKOGEY. METHOD OF AND APPARATUS FOR BURNING HOLES IN METAL.

Patented AugAlZ, 1890.

. coiled spring h or otherwise.

UNITED STATES PATENT OFFICEa \VILLIAM P. KOOKOGEY, OF BROOKLYN, NEYV YORK, ASSIGNOR TO THE KOOKOGEY ELECTRIC COMPANY.

METHOD OF AND APPARATUS FOR BURNING HOLES IN METAL.

SPECIFICATION forming part of Letters Patent No. 434,133, dated August 12, 1890.

Application filed April 25, 1890. Serial No. 349,519. (No model.) A

To all whom it may concern.-

Beit known that I, WILLIAM P. KOOKOGEY, of the city of Brooklyn, county of Kings, and State of New York, have invented a new and useful Burning Apparatus, of which the following is a specification.

My invention relates to the use of electricity for the purpose of heating tools which do their work in a more or less heated condition.

It consists substantially of the combination of an electrical circuit having a sufficient current and provided with two isolated contactpoints, between which the circuit is normally broken, with the appropriate tool for the special work designed to do, such tool being of a sufficiently high resistance in proportion to the current to heat thereunder, so arranged and connected that the tool may during its work, or just before its work is done, be conveniently applied to the contact-points, and thus become a part of the circuit and be heated.

In the accompanying drawings, Figure 1 shows the tool, the heating-circuit,aud a relaycircuit, the relay operating, in combination with the tool, to break the heating-circuit at a predetermined time. Fig. 2 shows a varied arrangement without the relay-circuit, but with devices to break the main circuit at particular moments. Fig. 3 shows a variation in arrangement in which the material which is to be acted upon is itself utilized to form part of the circuit. Fig. 4. illustrates the principal idea of the invention without adjuncts.

A is the tool, which, as shown in the drawings, maybe a solid cylindrical punch of steel or other appropriate metal.

I) is the source of the electrical energy, its circuit being supplied with two stationary springs e e, by contact with which the toolA becomes a part of the circuit.

The tool A, being mounted in appropriate bearings in a bracket 1), is designed to be heated between the points where it touches the two contacts 2 and e, and then brought down by hand or otherwise upon the work G and withdrawn therefrom by the operation of the An equivalent method would be to place the work G upon a carriage moving through ways or bearings,

- by which it might be advanced and withdrawn from the tool A, the tool remaining stationary.-

In Figs. 1 and 2 additional mechanism is shown, by which the heating-circuit may be broken when the tool is not in use or after it has been heated sufi'iciently. This is accomplished in Fig. 2 by means of insulatingpieces 8 8 attached to or set into the tool A at appropriate points. Thus in this figure, when the tool A is at rest, the circuit is broken at both poles, the spring 6 not being in contact with the tool A, and the spring 6 resting upon the insulating material 3'. the tool A descends the metal of the tool A comes into contact with each of the springs e and e and is heated, while the upper spring 6 passes onto the insulating material 5 when the tool has been sufficiently heated.

In Fig. 1, L is the battery of a relay-circuit containing a magnet 72 and a circuit-breaker j. The rod 41, rigidly attached to the toolA, closes the relay-circuit when the tool is at rest by bringing the circuit-breaker j against the contact 70, and the magnet n being thus energized operates to break the heating-circuit by withdrawing the circuit-breaker 0 from the contact 19. The spring m breaks the relay-circuit as soon as the tool A begins to move downward, and the magnet nbeing then de-energized the spring 4 completes the heating-circuit. A rheostat may be introduced at a convenient point in the heating-circuit to prevent overheating of the tool.

In Fig. 3 the work G is supposed to be of conducting material and capable of forming 'a part of the main circuit. This form of the invention is particularly applicable to the process of punching holes through comparatively fusible material. The work G is placed upon the stationary contact f. As the toolA moves downward and comes in contact with the upper surface of the work G, the circuit is complete and the toolA is thereby heated. From this point the operation is the same as in the other forms. The current to be used should be sufficient to heat the tool to a proper degree, but not sufiicient to fuse the material to be worked. A current sufiioient to form an are between the tool and the material would not serve the purpose of the invention.

As soon as I claim as my invention 1. An apparatus for burning holes in comparatively fusible material, consisting of a tool or punch capable of heating under the electric current, a source of electrical energy capable of supplying current adapted to heat the punch and having terminals bridged by the punch, the punch forming part of and completing the circuit between the terminals, substantially as and for the purpose described.

2. An apparatus for burning holes in comparatively fusible material, consisting of a tool or punch capable of heating under the electric current, asource of electrical energy capable of supplying current adapted to heat the punch, the punch forming part of and completing the circuit between the terminals, and appropriate bearings in which the punch is capable of being moved, substantially as and for the purpose described.

3. A burning or heating apparatus consist ing of the following elements: a burning or heating tool, appropriate bearings therefor in which such tool is capable of being moved, a source of electrical energy, terminals therefor bridged by the tool, and a relay-circuit operating (when closed) to open the heatingcircuit, and itself automatically closed by the movement of the tool when such tool is not in use, substantially as and for the purpose described.

v 4. The method of burning holesin comparatively conducting material, consisting of interposing it between the terminals of a source of electrical energy supplying a current insufficient to fuse the material to be operated on, one of such terminals consisting of a tool or punch made of a substance adapted to heat with the current used, and the material itself forming the bridge between the two terminals and thus completing the circuit, and then moving such heated terminal through the material, substantially as and for the purpose described.

In Witness whereof I have hereunto set my hand, this 23d day of April, 1890, at the city of New York, in the presence of two Witnesses.

- NVM. P. KOOKOGEY.

W'itnesses:

OSGOOD SMITH, WILLIAM G. SMITH. 

